1、Designation: D 6142 03Standard Test Method forAnalysis of Phenol by Capillary Gas Chromatography1This standard is issued under the fixed designation D 6142; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the determination of knownimpurities in phenol by gas chromatography (GC). It isgenerally meant for the an
3、alysis of phenol of 99.9 % or greaterpurity.1.2 The following applies to all specified limits in this testmethod: for purposes of determining conformance with thistest method, an observed value or calculated value shall berounded off “to the nearest unit” in the last right-hand digitused in expressi
4、ng the specification limit in accordance withthe rounding-off method of Practice E29. Precision data isbased on impurity concentrations of 15 to 70 mg/kg. Users ofthis test method believe it is linear over a wider range.1.3 This standard does not purport to address all of thesafety concerns, if any,
5、 associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see Section 9.2. Referenced Documents2.1 ASTM Standards:D 3852
6、Practice for Sampling and Handling Phenol,Cresols, and Cresylic Acid2D 4790 Terminology of Aromatic Hydrocarbons and Re-lated Chemicals2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3E 355 Practice for Gas Chromatography Terms and Rela-tionships4E
7、691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3E 1510 Practice for Installing Fused Silica Open TubularCapillary Columns in Gas Chromatographs42.2 Other Document:OSHA Regulations, 29 CFR, paragraphs 1910.1000 and1910.120053. Terminology3.1 See Termino
8、logy D 4790 for definition of terms used inthis method.4. Summary of Test Method4.1 A known amount of an internal standard is added to asample of phenol. The prepared sample is mixed and analyzedby a gas chromatograph equipped with a flame ionizationdetector (FID). The peak area of each impurity and
9、 the internalstandard is measured. The amount of each impurity is calcu-lated from the ratio of the peak area of the internal standardversus the peak area of the impurity. Results are reported inmilligrams per kilogram.5. Significance and Use5.1 This test method is suitable for setting specification
10、s onphenol and for use as an internal quality control tool wherephenol is produced or is used in a manufacturing process. Itmay also be used in development or research work involvingphenol. It is generally applied to determining those commonlyoccurring impurities such as mesityl oxide, cumene, hydro
11、xy-acetone, acetone, alpha-methylstyrene, 2-methylbenzofuran,acetophenone, o-cresol, and m acetone; acetophenone;a-methylstyrene; cumene; gas chromatography; hydroxyacetone;mesityl oxide; m o-cresol; phenol; sec-butyl alcohol7Supporting data are available from ASTM International Headquarters. Reques
12、tRR:D161021.TABLE 2 Densities of CompoundsComponent Density at 25C (unless otherwise noted)Phenol 1.072 (at 45C)Acetone 0.791Mesityl oxide 0.853Cumene 0.862Hydroxyacetone 1.082a-Methylstyrene 0.9092-Methylbenzofuran 1.057Acetophenone 1.026sec-Butanol 0.808o-Cresol 1.047m or through the ASTM website(www.astm.org).D6142036
